Sergei P. Kulik

TL;DR: The experimental results demonstrate the possibility of delayed determination of particlelike or wavelike behavior via quantum entanglement, and the which-path or both-path information of a quantum can be marked or erased by its entangled twin even after the registration of the quantum.

TL;DR: In this article, a quantum teleportation experiment in which nonlinear interactions are used for the Bell state measurements is reported. But the experimental results demonstrate the working principle of irreversibly teleporting an unknown arbitrary polarization state from one system to another distant system by disassembling into and then later reconstructing from purely classical information and nonclassical EPR correlations.

TL;DR: In this article, the authors developed a technique that allows spectral measurements in the infrared range using visible-spectral-range components, based on nonlinear interference of infrared and visible photons, produced via spontaneous parametric down conversion.

TL;DR: It is shown quantitatively that entangled two-photon violate the EPR inequality, which provides a direct way to distinguish quantum entanglement from classical correlation in continuous variables.

TL;DR: In this paper, two types of interference were observed using two-photon spontaneous parametric radiation from two nonlinear interaction regions: Young and Mach-Zehnder interferometers.